Structure length
(face-to-face dimension, face-to-centre dimension) The distance between the inlet and outlet faces of the valve; or the distance from the inlet face to the outlet axis.
Through way type valves structure length
In the valve body channel terminal two perpendicular to the valve axis between the plane distance.
Angle type of valves structure length
(angle type of valves Face to face, end to end, center to face and centerto end dimensions)
In the valve body channel a terminal perpendicular to the axis of the plane and the valve body another terminal axis between the distance.
Structural form
Various types of valves in the structure and geometry of the main features.
Straight-through type
Inlet and outlet axes coincide or parallel to each other in the form of valve body.
Angle type
Inlet and outlet axes are perpendicular to each other in the form of valve body.
DC type (y-globe type, y-type,diaphragm type)
The path into a straight line, the stem position and the valve body path axis into an acute angle of the valve body form.
Three-way type
The valve body form with three access directions.
T-pattern three way type
Plug (or ball) of the pathway is “T” ring three-way type.
L-pattern three way type
Plug (or sphere) of the pathway is “L” quadrant of the three-way type.
Balance type
The use of medium pressure to balance the axial force on the stem of the structural form.
Lever type
The use of levers to drive the structure of the opening and closing parts.
Normally open type
No external force, opening and closing automatically in the open position of the structural form.
Normally closed type
When there is no external force, the opening and closing parts are automatically in the closed position of the structural form.
Steam jacket type
With steam heating jacket structure of various valves.
Bellows seal type
With the bellows structure of various valves.
Full-opening valve
All parts of the valve flow path inside the valve size and nominal pipe diameter size of the same valve.
Reduced-opening valve
Valve flow channel hole diameter reduction of the valve.
Reduced-bore valve
Valve flow path hole diameter reduction, and valve closure of the flow path for the non-circular valve.
One-way valve
Designed to seal only one media flow direction of the valve.
Bi-directional valve
Designed for two media flow direction are sealed valve.
Twin-seat, both seats bi-directional, valve
Valve has two sealing seats, each seat of the two media flow direction can be sealed valve.
Twin-seat, one seat un-directional and one seatsbi-directional, valve
Valve with two sealing pairs, in the closed position, the two sealing pairs can simultaneously maintain a sealed state, the cavity (between the two sealing pairs) of the valve body has a pressure relief medium interface. The symbol DBB is used.
Top seal (back seat, back face)
When the valve is fully open, a sealing structure to prevent the medium from leaking at the stuffing box.
Pressure seal
The structure of automatic sealing at the connection between valve body and valve cover by medium pressure.
Dimension of valve stem head
Valve stem and handwheel, handle or other manipulation machinery assembly connection part of the structure size.
Dimension of valve stem end
Valve stem and opening and closing parts of the structure of the size of the connection.
Dimension of connecting channel
Opening and closing parts and valve stem assembly connection parts of the structural dimensions.
Type of connection
Valve and pipeline or machinery and equipment used to connect the various ways (جیسا کہ flange connections, threaded connections, welding connections, وغیرہ).